Pencil sanding machine



fist, 2Q, 1931. B, D R 1,827,839

PENCIL SANDING MACHINE Filed March 27, 1930 4 Sheets-Sheet 1 I nueritorA llorhcy 06L 1931- B. F. DERRYBERRY L ZBQ PENCIL SANDING MACHINE FiledMarch 27, 1930 4 Sheets-Sheet 2 l Invenlor V A ilomcy Get. 20,1931. 3DERRYBERRY 1,827,839

PENCIL SANDING MACHINE Filed March 27. 1930 4 Sheets-Sheet 3 Invenlor Izrzwya A llorney Oct. 20, 1931. 48. F. DERRYBERRY 7,

PENCIL SANDING MACHINE Filed March 27, 1930 4 Sheets-Sheet 4 A llorney ci, acter described which will sand thGLPBIlGll the line8.'8 of Figure 7.V

I 25 reception ofthe paint. v

Fatentecl 0ct. 20,1931' I I i untrue m ee pmar orator:

Application filed March 27, 1930. Serial No. 439,371.

This invention relates to new and useful the line 2'2 of Figure 1looking in the di improvements in pencil sanding machines rectionindicated by the arrows. i and has for its primary object to provide inFigure 3 is a detail view in cross section a manner as hereinafter setforth, a machine showing a pair of rollerswhich feed the pen- ,v of thischaracter embodying a construction oils to the sanding mechanism, I 55 Uand arrangement of parts whereby the pen- -Figure 4 is a detail View inside elevation oils will be successively sanded with great of one of thepencil feeding rollers, rapidity in a manner to prepare same for theFigure 5 isa view illustrating the arrangesubsequent painting operation.mentjof the sanding beltand the pressure Another important object of theinvenrollers which maintain saidbelt in engage- 6Q tion is to provide-apaper sanding machine ment with the sides of the pencil,

which is adapted to operate on pencils of Figure 6 is across sectionalview showing hexagonal cross section and which further the means foractuatingthe device which conembodies a construction whereby two.diatrols the passage of the pencils from the hopmetrically oppositesidesof the pencil will per, j r v V 1 o be sanded simultaneously. V Figure 7is a detail view ,in elevation of Another important object of theinvention the barrel through which the pencils pass is to provide, in amanner as hereinafter set when being sanded, I forth, a pencil sandingmachine of the char- Figure 8 is a viewtakcn substantially on Figure 9isa crosssectional view taken sub-v longitudinally with the grain ofthe.wood instead of crosswise to said grain "as isdone stantially on'the;line 9-9.0f Figure 7 with sanding machines in use at present, thusFigure '10 is across sectional view takenpreparing a moresatisfactorysurface for the substantially on the'line 10 10 of Figure 7V. V a -Figure11 is a detail View in top plan-show- :5 Still anotherimportant object of the inmg the slidable follower which moves thevention is to provide a pencilsanding mapencilsfrom beneath the hopperto the feed chine embodying novel feeding mechanism rollers. which ispositive and automatic in its action Figure 12 is a cross sectional.view taken in feeding the pencils from a supply hopper substantially onthe line 1212 of Figure 1 so to the sanding operation. I looking in thedirection indicated by the ar- Other objects of the invention are toproo s; an illustrating the sanding mechavide a pencil sanding machineof the charn II}, i acter set forth which will be simple in con- Y g 131S a fragmentary i 111 g struction, strong, durable, eifiOient i it etudinal section showing the entrance end of 85 and which may bemanufactured atlow cost. b r e i I c 'j All of the foregoing and stillfurther 010- Ffgure 14.15 a detail longltudutal jects and advantages ofthe invention will sectionshowing the penc1lg111de wh1ch is 1nbecomeapparent from a study of thefolterposed between the feed rollers, andthe barrel. V lowmg t p takenfn W Figure 15 is. adetail view incross-section the accompanymg drawlllgs Whemm hke through the followertaken substantially on characters of reference designate corresponds theline of Figure 1 1 mg Part throughout the several-vlewsrand Figure 16 isa cross sec tional view taken Wile/E111? i substantially on the line16."1'6 of Figure l 95' f 1 1S aivlew 111 slde tl of a looking in thedirection indicated, by. the pencil sanding machine constructed inacarrow H Y cordance With thi inv ti n, Figure 17 is aview in verticallongitudinal Figure 2 is a vertical cross sectional view. sectionshowing the pencil supply and feed-c 7 so taken through the hoppersubstantially on ing mechanism, I 1

sec-

Figure 18 is'a view showing the driving chain, belt and sprocket foractuating the various elements comprised by this invention.

Referring to the drawings in detail and'to Figure 1 thereof inparticular, it will be'seen that reference numeral 1 designatesgenerally a supporting stand comprising the pairs of vertically disposedfront and rear legs 2 and 3 respectively upon the upper end Of'Which ismounted a horizontally disposed rectangularframe which includes thelongitudinal side bars 4 and 5.

Mounted onthe rear end portion Of th supportingframe between the sidebars 4 and 5 is a base 6 provided with anintegral rearwardly directedextension 7. A groove 8 is formed longitudinally in the upper side ofthe base 6 and the extension 7 for slid-ably receiving the follower rod9 which, as best seen in Figures 11 and 17, is mounted on one endportion of the cross head 10 of the bar 11 which in turn is mounted forreciprocatory movement longitudinally in the extension 7 on one sideofthe groove 8.

A guide rod 12 is mounted on the opposite end portion of the cross head10 for sliding movement in the groove 13 formed in the extension 7 Acoil spring 14 encircles the follower rod 9 and has one end impingedagainst the free-end of the extension 17 and its'opposite end impingedagainst the cross head and in a manner normally urge said cross headandthe rodrea-rwardly.

A hopper comprising a pairofcomplemen-f tary front and rearvertically-disposed sections 15 and 16 is mounted on the base .6 andeach ofsaid sections 15 and 16 comprises a substantially V-shaped sidewalls'17 havingthe integral downwardly converging mar- 'ginal flanges 18communicating with the channel 19 formed in the integral extension 20,said passages 19 communicating with the groove or channel 8 in the base6.

A-shaft 21 is mounted for rotation through the upper portions of .theextension 26 ,011 one side of the passages19 and fixed on the oppositeend portion of said shaft 21' between the hopper sections 15 and 16 is apair! of cams 22 which are adapted to control the passage of the pencilsthrough the passages 19. The shaft 21projects forwardly from the hoppersection 15 and has fixed thereon a drive pulley 23. v t

V Spaced, opposed, longitudinally extending plates 24 are mounted on thebase .6 adjacent the forward side of the hopper section 15 and mountedfor'rotation between saidpla-tes through the medium of the rotary shafts25 which are journalled therethrough are' the pairs .of complementaryfeed rollers 26 and 27. )As best seen in Figures 3 and 4 of thedrawings, each of the feed rollers comprises a disk 28 upon theperiphery of which 'is mounted a rubber annulus 29 havinga polygin itsperiphery.

Theannuli 29 are formed'of soft rubber.

The feed rollers of each pair are spaced slightly'apart and arepositioned to receive therebetween, the pencils from the channel 9 assaidpencils pass through the throat 31 in the lower end of thehoppersection 15.. The shafts 25 have fixed on one end the meshed gears whichare oper atively connected to a drive gear 33 fixed on one'end ofa shaft34 having a worm 35 fixed on its opposite end portion.

Longitudinal strips 36 are mounted on the upper edges of the plates 24in any suitable manner and mounted on said strip in longitudinallyspaced relation of the blocks 37 which'support a pair of transverselyextend.- ing bars 318 therebetween. A 1 brush '39 is secured betweenintermediate portions .of the bars 38 and depends therefrom forengagement with'the uppermost of the pairs of feed rollers 26 and 27 ina manner to keep said feed rollers clean.

As best illustrated-in Figures 1 and 14, a

4 and .5 of the supporting frame: at a point 7 forwardly of the guide 40(see Figures. 1 and 12) ista substantially inverted: U-Jshaped bracket46 having the depending arm portion 47' and 48 which rests ontop of thelongitudinal bars 4ia-nd 5 respectively and a cross beam 49 is formedintegrally with the de: pending arm portions '47 and 4.8 and extendstherehtween adjacent the bars 4 and ,5.

Standards 50 are rigidly mounted on the bars 4and 5 in forwardly spacedrelation to the bracket 46,. .It should he hereme t that the stand rds0' are in stagg red relatio w th re pe t t Tether n he ba 4 and A arm 5,ext nds upw rd y o the standard v-ll nthe ar 4 a d a sha t 52 is mountedb t said a m 5 an t e bracket 46 or rot tion andhas fixed the e napulley 53.

Theshaft '52 extends forwardly through the bracket 46 and has fixedthereon a sprocket 54. Depending fromt'hebar 5 of the supporting frameisa pair of curved arms 55 between the free ends of which is mounted forrotation a pulley 56. Brackets '57 are mounted on the bars 4 and "5 instaggered relation with respect to each other and opposite to thestandard-50 and beams (not-shown) idenltical in construction to thebeams=49 of ,the

brackets 46 extend between said 'standardsf5O and the brackets57.'*-

An arm 58 extends upwardlyfrom the for ,ward end portion, of the bar ofthe support- 5 ing frame and a shaft 59 extends between said arms andthe brackets 46 for rotation and has fixed on its forward end portion alarge sprocket gear 60 and a comparatively small sprocket gear 61.

A pulley 62 is fixed on the forward end portion of the shaft 59 adjacentthe arm 58. A pair of depending arms 63 extend down wardly and inwardlyfrom the bar 4 ofthe supporting frame and rotatably mounted*therebetween isthe pulley 64.

A beam (not shown) similar to the beam 49 also extends from the lowerend portion of the arm 58 for rest on the beam 4. Pulleys A 65 and 66are mounted for rotation on the I at bars 4 and 5 respectively. The beam49 and all of the transverse beams which are similar thereto isprovided-With an intermediate circular enlargement 67 provided with arectangular opening through which extends the elongated barrel 68 havinga hexagonal bore 69 extending longitudinally therethroughk The entranceend of the bore 69 is flared'as indicated at 7 0 (see Figure 13) and inhori- I zont-al alinement with the bores 45 in guide 3 0 40. As clearlyillustrated in Figures 7 to 10 inclusive of the drawings, the sides ofthe barrel 68 are provided with longitudinally extending recesses whichcommunicate with 7 diametrically opposite sides ofthe bore 69 atdifferent points in the barrel and in a manner to successively exposethe opposite sides of the pencil 71 which is passing therethrough.Endless sanding belts 72 are trained over the pulleys 53 and 56, thepulleys 62 and 64 and the pulleys 65 and 66.

Both flights of each of the endless standing belts are maintained inengagement with the exposed sides of the pencils which are i passingthrough the barrel 68 through the medium of the rollers 73 which, ifdesired,

may be spring pressed.

A pan 74 ismounted on the forward end of the supporting frame 1 toreceive the-standard pencil from the discharge end of the barrel 68.Suction pipes 69 are associated with the standing belts 72 to conveydust therefrom.

An electric motor 76 is mounted on a support 77 secured to the leg 2 ofthe frame 1 and said motor drives an endless belt 78 trained over alarge pulley wheel 7 9 supported for retation in the arm 80 whichprojects forwardly from the leg 3 of the supporting frame 1. The pulley7 9 drives a shaft81 which extends ce transversely beneath and has fixedthereon a pulley 82 over which extends an endless belt 83 which drivesa'pulley 84 fixed on a shaft 85 mounted for rotation in the bracket 86which depends from the rear end of the 65 base 6.

ve io as'cl m -z- 1 .l l avingfthus described the, invention what I 3Adisk'87 is' fix'ed on the shaft 85for rotationtherewith and haseccentrically secured thereto a connecting rod 88-which is v,operativelyconneeted-to thecross' head 10 for re ciprocati'ng the follower rod 9.

Also fixed on' the shaft 81 1sasprocket89 over which-is} trained asprocket chain 90 which is operatively connected to the shaft 91 i I Theshaft 91" drives the pulley 23 and the shaft 21 of the.

inf a 'manner to rotate same.

feed regulatorthrough the mediumof the v pulley 92 a-nd the belt 93. Theshaft91 is also operatively connected to the stub shaft 94 mounted inthe depending arm 95 through the medium of the sprocket fch'ain 96yandthe shaft 94 drives the large gear 60 through the medium of the sprocketchain97.

A tightener 98 is provided for operative engagement withthe'chain 97. Anendless chain 99 is operatively connected to the shafts uponwhichthepulleys 53, 62 and 66are fixed,

said chain 99 deriving its-power from the sprocket 61 on the shaft 59upon which'the large gear 60 is mounted andin this manner each of thestanding bolts 72 is actuated. 7

fed on'eat a time in rapid succession into the channel 8' and thefollower rod 9 pushes each pencil between the-pairs of rollers 26 and 27which inlturn feed same through the guide 40 into the'barrel'68. Eachsu'cceeding pencil pushes the preceding pencil through the barrel. 5 r YThe endles's'sanding' belt moves very slowly owing to'the reductiongearing by which same 90 In use, the pencils"fron'1-thehopper arearedriven but the pencils travel through the barrel at; great speed withthe result that sanding operation is longitudinal with the grain of thewood of said pencilv andnot transversely thereto.

Y As'will 'bereadily apparent, each'of'the belts 72 is adapted to sandtwo sides of the pencil 'simultaneouslyas said pencil passes through thebarrel. I v It-isbelieved that the many advantagesof a-pencil sandingmachine constructed 1n accordance with thisinvention will bereadilyunderstood; and although the. preferred em bodiment of the invention isasillustrated and; described, it. is i to be understood. 1 that changesin the details of; construction may be had which will fall within thescope of the in-'- claimas new is:

. pencil sanding machine of the charac ter descr bed comprising, 1ncombinatloma supporting stand, an elongated barrel mount edon the standhaving bore therein for the c v passes through the barrel, means fordriving 7 able; in the. other rqoveme ns for reciprothe pencil throughthe barrel, pairsot supeating the cross head andmeans for actuat- V withthe exposed portions of the pencil in porting, members on the" stand,shafts mounte ing the feed rollers. a V I testimonywhereo'fl atfix mysignature. j BEN F. DERRYBERRY.

ed between the pairs of supporting members and disposed in pairs intransversealignment with the pairs of openings in the barrel, a sprocketgear fix'edwon one end portion of one shaft of each pair, an endlesschain. trained over the sprocket gears, another sprocket gear fixed, onone of said one shafts, a chain trained over the lastnamed sprocket gearfor connecting same to asource of power, a pair of pulleys operativelymounted on theshafts, and endless sanding belts trained overthe pairs?of pulleys and operatively engageable the barrel. v I g 2. 'A pencilsanding machine of the character described comprisingasupportingstand,

pencils, sanding belts engageble with the pen-s oils in the barrel,means for driving the belts, a supply hopper mounted on the stand, feedan elongated barrel mountedion the stand having a bore therein for the,passage ofthe ing means mounted on the stand and spaced from the barrelfor receiving the pencils from the hopper and driving said pencilsthrough the barrel, means for driving the feeding means, and .a guidedisposed between the feeding means and the barrel, said guide includingapair of spaced, opposed, upstanding arms and a connecting base portiomaneck projecting laterally'from one of the arms, said neck and the armsbeing provided with aligned bo-res for the passage ot the pencils,,,saidbores being aligned with the bore. of-the barrel and having theirintakeend portion flared for guiding 'thepencils thereinto. r

ter described comprising a supporting stand, a barrel mounted on thestand having a bore therein for thepassage of the pencils, sanding beltsmounted on the stand toroperative; j engagement with the pencils inthebarr'el,

. means for actuating the sanding" belts, and

means for feeding pencils to the barrel, the last named means includinga base mounted on the stand, an extension formed integrally on the base,said base and the extension hav-' ing a pair of parallel, longitudinalgrooves their upper side, a bar slidable on the-base and the extensionbetween the grooves-and projecting from the free end of the extension, across head on the outer end of the bar, a

hopper, for the reception of the pencils,

mounted on the base above one of the grooves for depositing the pencils;therein,"pairs of opposed feed rollers disposed between the hopper andthe barrel, a follower fixed on one end portion of the cross head andslidable in said one groove for moving the pencils a): ward thefeedrollers, a guide rod fixed on the other end portion of the cross headand slid- 3. A pencil sanding machine oi the charac

